public class Test {
    public static void main(String[] args) {
        MyQueue myQueue=new MyQueue();
        myQueue.offer(1);
        myQueue.offer(2);
        myQueue.offer(3);
        myQueue.offer(4);

        System.out.println(myQueue.peek());
        System.out.println(myQueue.size());

        System.out.println(myQueue.poll());
        System.out.println(myQueue.poll());
        System.out.println(myQueue.size());

        if(myQueue.isEmpty()){
            System.out.println("队列为空");
        }
        else{
            System.out.println("队列不为空");
        }
    }
}
